21132321000 has 128 divisors (see below), whose sum is σ = 75351893760. Its totient is φ = 4830240000.

The previous prime is 21132320969. The next prime is 21132321013. The reversal of 21132321000 is 12323112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 482151 + ... + 524150.

It is an arithmetic number, because the mean of its divisors is an integer number (588686670).

Almost surely, 2^21132321000 is an apocalyptic number.

21132321000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21132321000 is an abundant number, since it is smaller than the sum of its proper divisors (54219572760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21132321000 is a wasteful number, since it uses less digits than its factorization.

21132321000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006332 (or 1006318 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21132321000 its reverse (12323112), we get a palindrome (21144644112).

The spelling of 21132321000 in words is "twenty-one billion, one hundred thirty-two million, three hundred twenty-one thousand".